Currently, there are some differences between the two simulators affecting the appearance of the aircraft. These differences are primarily caused by the new lighting and texture rendering in MSFS 2024. Also, the avatars from MSFS 2020 are not currently shown in MSFS 2024.
The correct aircraft appearance is as shown in MSFS 2020, as this is a native MSFS 2020 aircraft.
MSFS 2020 1.38.2.0 MSFS 2024 1.2.11.0
The aircraft appearance in MSFS 2024 will be fixed in future updates once the MSFS 2024 stabilizes and the SDK reintroduces the Resync option.